30 CFR §817.68
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The operator shall retain a record of all blasts for at least 3 years. Upon request, copies of these records shall be made available to the regulatory authority and to the public for inspection. Such records shall contain the following data:
- (a)Name of the operator conducting the blast.
- (b)Location, date, and time of the blast.
- (c)Name, signature, and certification number of the blaster conducting the blast.
- (d)Identification, direction, and distance, in feet, from the nearest blast hole to the nearest dwelling, public building, school, church, community or institutional building outside the permit area, except those described in § 817.67 (e).
- (e)Weather conditions, including those which may cause possible adverse blasting effects.
- (f)Type of material blasted.
- (g)Sketches of the blast pattern including number of holes, burden, spacing, decks, and delay pattern.
- (h)Diameter and depth of holes.
- (i)Types of explosives used.
- (j)Total weight of explosives used per hole.
- (k)The maximum weight of explosives detonated in an 8-millisecond period.
- (l)Initiation system.
- (m)Type and length of stemming.
- (n)Mats or other protections used.
- (o)Seismographic and airblast records, if required, which shall include—
- (1)Type of instrument, sensitivity, and calibration signal or certification of annual calibration;
- (2)Exact location of instrument and the date, time, and distance from the blast;
- (3)Name of the person and firm taking the reading;
- (4)Name of the person and firm analyzing the seismographic record; and
- (5)The vibration and/or airblast level recorded.
- (p)Reasons and conditions for each unscheduled blast.